I would like to have MIRO be able to have linked layered or nested boards
Top level board that is a simplified summary of ideas. Each component on the highest level could break down to a lower level board where the high level component is decomposed into more detail
Many management type users want succinct summaries of ideas (top layer good for them)
People who have to build or develop ideas need to drill down into more detail. The devil is always in the detail. The lower layers provide the more detailed views that satisfy the builders or developers of the ideas.
Should not be limited to 2 layers - should be any number of layers.